Siemens SIMATIC ET 200SP HA Manuel D'utilisation page 49

3.14 Protective grounding
The ET 200SP HA distributed I/O system fulfills protection class III. Certain I/O modules can handle low voltage (see Intended
use (Page 36)). For such circuits, protection classes I or II may be applicable.
The protection class can be found in the technical specifications for the respective products.
WARNING
Electric shock
All devices with protection class I and all larger metallic parts must be connected to protective earth. This is the only way to
guarantee that the plant user is reliably protected from electric shocks.
3.15 Line connection
Information on supply voltage, frequency, power consumption and switch-on characteristics can be found in the technical
data sheet for the respective products and/or on the product itself.
NOTICE
Destruction of the product
Incorrect voltage or frequency values can lead to the destruction of the product. Ensure that the specified parameters are
adhered to. If necessary, adjust the power supply range before connecting the product.
You must ensure that an all-pole isolating device is connected upstream.
3.15.1 Connection to extra-low voltage
The product requires extra-low voltage with safe isolation from the low-voltage network (SELV/PELV) for the power supply.
Ensure that the supply voltages of the product are generated safely and separately.
The connection is made via the terminal modules. The connections are marked there as follows:
L+ / M
The terminal assignment is dependent on the type of terminal block. The terminals on the terminal block to which you
connect the supply voltage cables are presented in the following two tables:
The following terminals are available for the supply voltage on the terminal block types H1; K0; N0; P0:
Potential Terminals on the terminal block
• Ground • 1P2 and 2P2
• L+ • 1P1 and 2P1
Note: Terminals connected
The following terminals are available for the supply voltage on the terminal block types M1; L0; F1:
Potential Terminals on the terminal block
• Ground • 1P2 and 2P2
• 1L+ • 1P1
• 2L+ • 1P3
Note: Terminals not connected
The following terminals are available for the supply voltage on the terminal block types H0:
Potential Terminals on the terminal block
• Ground • M
• L+ • L+
The supply of the terminal blocks must be externally protected by fuses. Information on the fuse to be used can be found in
the technical specifications of the respective products.
The terminal blocks with D-SUB connector have no connection to the power bus. Here, the supply voltage for the I/O module
must be connected using a separate connector (included in the scope of delivery). The missing power bus function is
indicated by the black housing color of the terminal blocks.
An ungrounded installation of the IO device is always possible since there is no fixed ground connection in the IO device. The
power supply used (power pack/power supply module/battery) for 24 V DC must also be ungrounded and isolated.
ET 200SP HA Distributed I/O System
A5E52222765-AB, 11/2024
Marking of the terminal
Blue
Red
Marking of the terminal
Blue
Red
Marking of the terminal
• No color marking
• No color marking
Voltage on the power bus
• P2
• P1
Voltage on the power bus
• P2
• P1
• P3
Voltage on the power bus
• No power bus connection
• No power bus connection
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